Gas-heater for water-backs.



E. M. KENNARD; GAS HEATER FOR WATER BACKS, APPLICATION FILED JULY 26. 1908.

91 4,288, Patented Mar. 2, 1909.

1n: Mamas PETERS cm, WASHINGTON, n. c.

EDWARD M. KENNARD, OF BALTIMORE, MARYLAND.

GAS-HE ATER FOR WATE R-B ACKS Application filed. July 25, 1908.

Specification of Letters latent.

Patented March 2, 1909.

Serial No. 4%5,38

backs, the construction and advantages of which will be hereinafter set forth, reference being had to the accompanying drawings, i

in which:

Figure 1 is a perspective view of the heater,

partly broken away; Fig. 2 a transverse vertical sectional view of the heater and a stove, showing the heater in its operative position with relation to the water-b ack of the stove; and Fig. 3 a horizontal sectional View, taken on the line (Ir-(Z of Fig. 1.

The main object of the present invention is to provide a simple and effective portable gas heater for the ordinary water back which is usually employed in conjunction with coal ranges and stoves and connected with a boiler.

The device is adapted to be set upon the grate of the range, next to and against the exposed face of the water-back, and is provided with means whereby the heat emanating from the gas-flame will be held against the face of the back in such manner as to fully utilize the heat units of the fuel before they pass from the water-back. The construction is such that the heater may be readily placed within the fire-box of a stove and removed therefrom when it is desired to employ the stove in the usual manner, no particular fittings being necessary inasmuch as it is proposed to conduct the gas to the burner through a flexible pipe leading to the ordinary gas-burner or j et which is usually located sufficiently near the stove to be available.

In the drawings, 1 denotes the base-plate, provided with upwardly-projecting walls or members 2, one at each end, which walls are provided with openings to receive bprnerpipes 3 and 4, which as seen upon reference to Figs. 1 and 2, are each provided with two rows of perforations through which the mingled air and gas will be ejected. Each pipe is held in position. by a cap 5, screwed upon the blind end of the pipe, and by a hollow casting or head 6, screwed upon the opposite end of the pipe. Said head is provided with an opening at one side, and a nipple 7 is screwed into the outer end of the head and connects with the gas-supply pipe 8. passing through the restricted opening in the nipple 7, entrains the air through the opening in the head, which head in effect forms a mixing-chamber for the air and gas,

and the mixture passes into the pipe on its way to the outlets formed thereiin In other words the construction is of the usual Bunner type.

Each of the upright end walls 2 is provided with an outward i s-extending arm or flange 9, which car ies or has secured to it a retaining shield or cover formed of the end walls 10, side wall 11 and top plate 12, the wall 11 being interiorly covered with asbestos 13, and the top plate 12 being formed with a series of openings 1 to permit the passage of the products of combustion from the chamber formed by the shield and the adjacent face of the water-back when the burner is placed against the water-back, as indicated in Fig. 2.

()rdinarily it is designed that the top plate 12 shall occupy a position slightly above the upper edge of the water-back, so that the products of combustion which pass from the burner into the chamber will be drawn over the upper end of the water-back, thus utilizing the products of combustion to the fullest extent. If, however, the grate should beso low as to bring the top plate 12 below or in line with the upper end of the water-back, the perforations 14 will permit the products of combustion to pass out and thus main tain an upward draft for the heat along the face of the waterback.

In order that the products of combustion may be retained in the chamber formed between the shield and water-back, the lower edge of the wall 11 is, as shown in Figs. 2 and 3, preferably flared outwardly over the pipe 4, thus insuring the passage of the products of combustion from the burner into the chamber.

A handle 16 will preferably be secured to the outer face of the shield, in order that the device may be readily removed from the stove or placed therein as occasion may require.

The device has in practice been found very'eflicacious and may be used where it is impracticable, either for lack of space or on account of expense, to employ the gasheaters now in use for heating the water in a boiler when the coal range is not employed.

Having thus described my invention, What I claim is:

1. In a portable heater for the water-backs of coal ranges and the like, the combination of a base; a burner supported thereby and adapted to have the flame emanating therefrom impinge against the waster-back; and a shield mounted above the burner and adapted to form, in conjunction with the Water-back, a retaining chamber for the products of combustion passing from the burner, whereby said products of combustion will be held in contact with the face of the water-back.

2. In a portable heater for the water-backs of coal ranges and the like, the combination of a sup )orting base; a burner carried thereby; an a shield located above the burner and adapted, when the device is positioned, to form, in conjunction with the outer face of the water-back, a chamber or compartment for holding the products of combustion from the burner against the face of the water-back, said shield being so formed as to permit the products of combustion to pass out at the upper end thereof.

3. In a portable heater for water-backs, the combination of a base; a burner supported thereby; and a shield mounted above the burner and adapted, when placed against the water-back, to form a chamber for holding the products of combustion adjacent to the water-back, the upper end of the shield being located at a point slightly above the upper end of the water-back, whereby the products of combustion will be deflected over the upper end of the waterback as they pass from the chamber.

4. In a portable heater for water-backs, the combination of a base; a burner carried thereby; and a shield located above the burner, adapted when placed against the water-back to form a chamber for the retention of the products of combustion adjacent to the face of the water-back, the top plate of the shield being provided with a series of openings to permit the products of combustion to pass therethrough.

5. In a portable heater for water-backs, the combination of a base; a burner carried thereby; and a shield located above the burner, said shield comprising two end walls, a back plate, and a top plate which, when the parts are positioned with relation to the water-back, will form a chamber for the retention of the products of combustionpassing from the burner and hold the same against the water-back.

6. In a portable heater for water-backs, the combination of a base; a pair of burners carried thereby; a shield mounted upon the base and standing above the burners, said shield comprising an outer wall having an outwardly extending lower edge, end walls, and a top plate; means for preventing the radiation of heat through the outer wall of the shield; and a handle secured to said outer wall.

In testimony whereof I have signed my name to this specification in the presence of two subscrlblng witnesses.

EDWARD M. KENNARD. Witnesses:

JOHN W. GARDNER, RAYMOND E. HORN. 

